Issue with regex in 5.0 preview1 #33399
Description
We got reports of dotnet dev-certs not working in 5.0-preview1. I've debugged through the code and determined that the issue was a regex that was failing.
I've investigated and this seems to be a regression in 5.0. Here is a minimal repro between 3.1 and 5.0 that showcases the issue.
/Users/jacalvar/work/repro/regexrepro> dotnet run --framework netcoreapp3.1
True
/Users/jacalvar/work/repro/regexrepro> dotnet run --framework netcoreapp5.0
False
/Users/jacalvar/work/repro/regexrepro> cat ./Program.cs
using System;
using System.Text.RegularExpressions;
namespace regexrepro
{
class Program
{
static void Main(string[] args)
{
var result = Regex.Match("CN=localhost", "CN=(.*[^,]+).*", RegexOptions.Singleline, TimeSpan.FromMinutes(1));
Console.WriteLine(result.Success);
}
}
}